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EN 1.4959 Stainless Steel vs. AISI 444 Stainless Steel

Both EN 1.4959 stainless steel and AISI 444 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4959 stainless steel and the bottom bar is AISI 444 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
23
Fatigue Strength, MPa 170
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 430
300
Tensile Strength: Ultimate (UTS), MPa 630
470
Tensile Strength: Yield (Proof), MPa 190
310

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 510
580
Maximum Temperature: Mechanical, °C 1090
930
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
23
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 31
15
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.4
3.4
Embodied Energy, MJ/kg 76
47
Embodied Water, L/kg 200
130

Common Calculations

PREN (Pitting Resistance) 21
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
95
Resilience: Unit (Modulus of Resilience), kJ/m3 96
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
17
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 3.2
6.2
Thermal Shock Resistance, points 15
16

Alloy Composition

Aluminum (Al), % 0.25 to 0.65
0
Carbon (C), % 0.050 to 0.1
0 to 0.025
Chromium (Cr), % 19 to 22
17.5 to 19.5
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 39.4 to 50.5
73.3 to 80.8
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 30 to 34
0 to 1.0
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0 to 0.030
0 to 0.035
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.25 to 0.65
0.2 to 0.8